1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright 2016, VIXL authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of ARM Limited nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef VIXL_ASSEMBLER_BASE_H
#define VIXL_ASSEMBLER_BASE_H
#include "code-buffer-vixl.h"
namespace vixl {
class CodeBufferCheckScope;
namespace internal {
class AssemblerBase {
public:
AssemblerBase() : allow_assembler_(false) {}
explicit AssemblerBase(size_t capacity)
: buffer_(capacity), allow_assembler_(false) {}
AssemblerBase(byte* buffer, size_t capacity)
: buffer_(buffer, capacity), allow_assembler_(false) {}
virtual ~AssemblerBase() {}
// Finalize a code buffer of generated instructions. This function must be
// called before executing or copying code from the buffer.
void FinalizeCode() { GetBuffer()->SetClean(); }
ptrdiff_t GetCursorOffset() const { return GetBuffer().GetCursorOffset(); }
// Return the address of the cursor.
template <typename T>
T GetCursorAddress() const {
VIXL_STATIC_ASSERT(sizeof(T) >= sizeof(uintptr_t));
return GetBuffer().GetOffsetAddress<T>(GetCursorOffset());
}
size_t GetSizeOfCodeGenerated() const { return GetCursorOffset(); }
// Accessors.
CodeBuffer* GetBuffer() { return &buffer_; }
const CodeBuffer& GetBuffer() const { return buffer_; }
bool AllowAssembler() const { return allow_assembler_; }
protected:
void SetAllowAssembler(bool allow) { allow_assembler_ = allow; }
// CodeBufferCheckScope must be able to temporarily allow the assembler.
friend class vixl::CodeBufferCheckScope;
// Buffer where the code is emitted.
CodeBuffer buffer_;
private:
bool allow_assembler_;
public:
// Deprecated public interface.
// Return the address of an offset in the buffer.
template <typename T>
VIXL_DEPRECATED("GetBuffer().GetOffsetAddress<T>(offset)",
T GetOffsetAddress(ptrdiff_t offset) const) {
return GetBuffer().GetOffsetAddress<T>(offset);
}
// Return the address of the start of the buffer.
template <typename T>
VIXL_DEPRECATED("GetBuffer().GetStartAddress<T>()",
T GetStartAddress() const) {
return GetBuffer().GetOffsetAddress<T>(0);
}
};
} // namespace internal
} // namespace vixl
#endif // VIXL_ASSEMBLER_BASE_H
|
